The parameters entered into the URL (querystring) allow you to accurately define the data to be retrieved as well as the perimeter in question.
It is also possible to select among 3 data output formats by indicating either xml (example below), json or html in the call header, using the following format:

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Accept:application/json

Accept:application/xml

Accept:application/html

By default, the selected format is json.

Protocol: HTTP GET

All calls are made by HTTP requests using the GET method.
With a single URL and http-basic authentication you will be able to retrieve all of the information about your site to make the most of this data.